import { spawnSync } from 'node:child_process';
import withSerwistInit from '@serwist/next';

// This is optional!
// A revision helps Serwist version a precached page. This
// avoids outdated precached responses being used. Using
// `git rev-parse HEAD` might not the most efficient way
// of determining a revision, however. You may prefer to use
// the hashes of every extra file you precache.
const revision =
  spawnSync('git', ['rev-parse', 'HEAD'], { encoding: 'utf-8' }).stdout ??
  crypto.randomUUID();

const withSerwist = withSerwistInit({
  additionalPrecacheEntries: [{ url: '/~offline', revision }],
  // Note: This is only an example. If you use Pages Router,
  // use something else that works, such as "service-worker/index.ts".
  swSrc: 'app/sw.ts',
  swDest: 'public/sw.js',
});

export default withSerwist({
  // Your Next.js config
});